Spraying device



E. Z. MUNZ Aug. 23, 1932.

SPRAYING DEVICE Filed Sept. 16, 1929 Patented Aug. 23, 1932 ERNEST z. 1VIUNZ, or srnrnorrrnnniorrro SPRATYING DEVICE Application filed September 16, 1929. Serial No. 393,024.

This invention relates to sprayingdevices, such as are used for spraying paint and the like, and is in the nature of an improvement upon the spraying device of the application for patent filed by me December 27, 1927,

Serial No. 242,57 5. v a

The spraying device of the aforesaid application embodies auxiliary air jets to corn trol the shape of the jet of liquid and one object ofthe present inventionis to provide means whereby these auxiliary air jets may be so controlled as toregulate the size of the fan shaped spray produced thereby.

A further object of theinvention is to iii-provide aspray head having an air nozzle and means cooperating therewith to vary the size andshapeof the'auxiliary airout: lets.

Other objects of the invention will aptpear as the device is described'in detail.

In the-accompanying drawing Fig. 1 is a longitudinal sectional View taken centrally.

through a spraying device embodying my invention, andpartly inelevation; Fig. 2 is Zfigan end elevation of the spray head; Fig. 3 is a longitudinal sectional view ofthe spray head showing'thecap adjusted to a position different from that sho'wnin Fig. 1; Fig. 45

is an end View of a portion of the spray head showing the cap adjusted to impart totheauxiliary air outlets an intermediate size;

Fig. 5 is a similar view showing the cap ad- I spray head and arranged about the tapered justed to impart to the auxiliary air jets a larger size ;Fig. 6 is a plan view of the air 6 nozzle and cap showing the means for retaining the cap in adjusted positions; Fig. 7 is a rear view of the cap; and Fig, 8 is a front elevation of the air nozzle with the cap removed. a r 9..' In the drawing I have illustrated one embodiment of V the invention and have shown the same as embodied inv a sprayingdevice corresponding in its -main features of construction to the spraying device of the aforesaid application but it will be under-V stood that this particular embodiment has been chosen for the purpose of illustration only, that the invention may take various forms and may be applied to spraying devices of various kinds. 1 r

outlet 25. The air nozzle is here shown as The sprayingdevice here illustrated com.- I prises a supporting structure or main frame having a front portion 10'and a rear portion 11 connected one to the other by an intermediate arch or bridge 12. Mounted atg the forward end of the supporting structure is a spray head comprising a body por-- tion 13 having a reduced rear end portion 14; which extends through a suitable opening in the front end. 10 .of the supporting I structure and is threaded to receive a nut 15 by means of which the spray headis secured to the supporting structure. The body por-' tion 13-of the'spray head has a longitudinal bore; extending throughout .its length and the intermediate portion of this bore is enlargedas shown at 16 to provide a liquid chamber which may beconnected bya conduit 17 extending through a nipple 18, with, any suitable source of supply for paint or other liquid to be sprayed. Mounted in' the forward end of the body portion leis a liq:

uid nozzle 19 having a tapered discharge opening to receive a needle valve 20 which is carried by a stem 21 extending rearward; ly through the bore of the body portion 13 v. and having its rear end supported in a guide= way 22 in the rearpar't ll'of the support ing structure. A spring 23 acts on the stem 21 to move the same forwardly and hold the 1 needle valve 20 to its seat. 1 Mounted on the body portion 13 of the nozzle and constituting a main air outlet I which when the liquid valve 20 is opened,

will cause a jet of liquid tobe discharged from the nozzle. The air nozzle is also proyided with auxiliary air outlets which converge forwardly toward the axis of the liquid nozzle andareadapted to discharge jets of air against the jet of liquid and thus flats ten the same andfcon'vert the jet into a fan shaped spray. In the present instance, I

have shown two pairs of auxiliary air outlets, 26 and 27 the outlets of each pair being arranged on opposite sides of'the main air having a frusto-conical forward end portion I which is spaced from the tapered end of the liquid nozzle to provide an air chamber 28 which communicateswith the main air outlet 25, and the auxiliary air outlets comprise grooves formed in the outer surface of the converging end wall of the air nozzle.

A cap 29 is mounted about the outer surface of the air nozzle and closes the outer sides of u the grooves 26 and 27 so as to'convert the same into ports. This cap has-a rearwardly' extending portion whichis mounted about a cylindrical part of the air nozzle and is retained thereon by coupling. member..30

which is screw. threaded on to the body portion of the spray head. Thegrooves 26 and 27 are approximately semi-circular in cross section andin order to'vary the size thereof and thus regulate the discharge of air therefrom the cap 29 is'provided'in' its inner surface with one or more grooves adjacent to each" of the grooves 26 and 27 andadapted to .be movedinto and out of registration there-' with.v In the present instance I have pro- "vided'the cap with twogrooves for each groove in. the air nozzleyas shown'at- 31 and 32; The groove 31 is approximately semi circular in cross section while the. groove issomewhat smaller than the groove 31. By

rotating thegcap 29 either the grooves 31, the grooves 3201 aniadjac'ent ungroovedportion of the cap maybe brought into line with the respective grooves 26"and 27. When the larger grooves 31 are in line with the grooves in the air nozzle the auxiliary out let ports will be substantially cylindrical and y will have a: relatively large capacity, as

shown in Fig. '5. VVhenthe smallergrooves 32- are in line .with'the grooves' in the air nozzle the auxiliary outlet ports would be approximately elliptical in shape and will have a smaller capacity, as. shown in. Fig. 4.

When ungrooved portions of the cap are in shown in Fig. 2.

line withthe grooves26 and 27 thec-apacity of the grooves will be'still further reduced the operator can control the width of the fan shaped. spray to adapt it to the particular work in hand. The cap may be retained in adjusted positionsin any suitable manner.

In the present instance the rearwardly ex tending portion thereof has three notches '33 arranged to engage a stud or pin, 34 carried by the cylindricalportion of the airnozzle. These inotches '33 are. so arranged withrelation tothe grooves in the cap that when any none of the notchesis in engagement with the pin. 34 the corresponding portions of, the cap will be in line with the respective grooves in the nozzle. To adjust the cap the coupling is removed or screwed outwardly far enough to release the capand after the cap has been adjusted and the coupling again tightened down the cap will be retained firmlyin 'itsadj'usted position. I

The body portion of the spray-head is provided with longitudinal conduits leading from the r'espectiveair outlets to the rear end of the spray head where they are connected with other conduits in the supporting structure, which in turn may be connected :with a suitable source 'of. supply for air under pressure. vAs here shown, a main air conduit 35 leads from the air chamber 28, to

the rear end of'thesp head" The I duits 36 lead from the auxiliary outlets 26 to therear end of the spray head, and other conduits, oneof which is. shown at 37,1ead

from the auxiliary air outlets 27350 the rear end of the spray headxThe supporting structure has three conduits extending lengthwise thereof, as shown 'at 38,39 and 40. In

order to properly distribute the air-from the "conduits'38, 39 and 40 to the corresponding conduits in-the spray head a distributor 41 is interposed between the spray headfand the forward ends 10 of the supporting structure. This-structure is ofthe type shown in' the' above mentionedapplication and need not be described in detail.v Briefly it"embodies a;

port to connect the conduit 38 with the con duit 35, and also'e'mbodies arcuate'channels 42 and 43 which communicate respectively with theconduits 39 and 40 andare con'nected at the forward side of the distributor,-

respectively, with the conduits 36 and 37.-

At the rear end of the supporting struc- V ture is an inlet air chamber 44' adapted to -be connected with any suitable source "of supply for air under pressure and with which the conduits 38, 39 and 40 are adapted to communicate. The; connection between the" air chamber 44 and threeconduits is selec;

tively controlled'to enable air to be delivered to the main air outlet 25 alone or to permit 7 air to be admitted to both the. main air outlet and a'selectedipair of the auxiliary .air outlets 26 1 and 27 .f- The means for effecting this control is the same as that shown in the aforesaid application and 'consists'in' a-rotary valve 45 so connected with thestem 21' of the liquid valve 20 as to be caused-to rotate with that-stem but to'gper'init the stem to have longitudinal movementwithrelation l thereto: Thus by rotating the stem'theair may be admitted to the desired outlet port or ports and by moving the same lengthwise the liquid outlet maybeopen'ed or closed.

The stem is actuated by a lever or trigger a 46. I Pivotally 'mounted'ona collar 47 rigidly secured to the stem 2l-and having its up-' per end arranged to fulcrum against' a part T 48 of the bridge 12 of the 's'upporting struc ture, so that when rearward movement is imparted to the lower end of the lever rearward movement will be imparted to the valve stem and when transverse movement is imparted to the lever the selecting valve will be adjusted. 48 of the bridge 12 is provided with notches 49 to receive the upper end of the lever and hold the same in adjusted positions.

IVhile I have shown and described one embodiment of my invention I wish it to be understood that I do not desire to be limited to the details thereof as various modifications may occur to a person skilled in the art.

Having now fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a spraying device of the character described, a spray head having a liquid nozzle, a valve to control said nozzle, an air nozzle having a main air outlet arranged to cause a jet of liquid to be discharged from said liquid nozzle, said air nozzle also having a frusto-conical outer surface provided with grooves converging forwardly toward the axis of said liquid nozzle, .a cap mounted about said frusto-conical surface to close the outer sides of said grooves and form auxiliary air outlets, said cap having-grooves adapted to register with the respective first mentioned grooves and being .adjustableto move the grooves therein into and'out of registration with the respective first mentioned grooves to vary the size of said outlets, and means to control the delivery of air to the several air outlets.

2. In a spraying device of the character described, a spray head having a liquid nozzle, a valve to control said nozzle, an air nozzle having a main air outlet arranged to cause .a jet of liquid'to be discharged from said llquid nozzle, said a1r nozzle also having a frusto-conical outer surface provided with grooves converging forwardly toward the axis of said liquid nozzle, a cap removably mounted about said frusto-conical, surface to close the outer sides of said grooves and form auxiliary air outlets, said cap having grooves adapted to register with the respective first mentioned grooves, means for securing said cap on said air nozzle in positions to cause either said grooves or ungrooved portions of said cap to register with the respective first mentioned grooves, and means to control the delivery of air to the several air outlets 3. In a spraying device of the character described, a spray head having a liquid nozzle, a valve to control said nozzle, an air nozzle having a main air outlet arranged to cause a jet of liquid to be discharged from said liquid nozzle, said air nozzle also having a frusto-conical outer surface provided with grooves converging forwardly toward the axis of said liquid nozzle, a cap mounted Preferably the part.

air outlets, said cap having. adjacent to each of said grooves a plurality ofparts any one of which may be caused to register with the adjacent groove, each of said parts being so shaped as to impart a different size to the outlet formed by the groove with which it is in registration, and means tocontrol the delivery of air to the several air outlets.

4. In a spraying device of the character described, a spray head having a liquid nozzle, a valve to control said nozzle, an air nozzle having a main air outlet arranged to cause a jet of liquid to be discharged from said liquid nozzle, saidair nozzle having a frustoconical outer surfaceprovided with two pairs of grooves, the grooves of eachtpair con-' verging toward the axis of said liquid nozzle, a cap mounted about said frusto-conical surface and having parts movable into and out of registration with the respective grooves to close the outer sides thereof and to form auxiliary air outlets and to control the size of said outlets, and selectively operable means to control the delivery of air to said main air having a main air outlet arranged to cause a jet of liquid to be discharged from said liquid nozzle, said air nozzle also having a frustoconical outer surface provided with grooves converging forwardly toward the axis of said liquid nozzle, a cap mounted about said frusto-conical surface to close the outer-sides of said grooves and form auxiliary air outlets,

said cap having grooves adapted to register with the respective first mentioned grooves and being adjustable to move the grooves therein into and out of registration with the respective first mentioned grooves to vary the size of said outlet, said cap having notches to engage a part fixed with relation to said air nozzle and retain said cap in its adjusted position, and means to control the delivery of air to the several air outlets.

In testimony whereof, I afiix my signature hereto.

ERNEST Z. MUNZ. 

